Water-cooled engine cylinder



FIG. 1 is a frontal perspective view of a water-cooled engine cylinder embodying my new design;

FIG. 2 is a front and left side perspective view thereof;

FIG. 3 is a front and right side perspective view thereof;

FIG. 4 is a rear perspective view thereof; and

FIG. 5 is a rear and right side perspective view thereof;

The bottom of such a cylinder, insofar as not shown by the figures, is unornamented. 

The ornamental design for a water-cooled engine cylinder, as shown and described. 